fftfilt_crcf

Fast Fourier transform (FFT) finite impulse response filter

Public Functions

fftfilt_crcf	fftfilt_crcf_create(float * _h, unsigned int _h_len, unsigned int _n)
fftfilt_crcf	fftfilt_crcf_copy(fftfilt_crcf _q)
int	fftfilt_crcf_destroy(fftfilt_crcf _q)
int	fftfilt_crcf_reset(fftfilt_crcf _q)
int	fftfilt_crcf_print(fftfilt_crcf _q)
int	fftfilt_crcf_set_scale(fftfilt_crcf _q, float _scale)
int	fftfilt_crcf_get_scale(fftfilt_crcf _q, float * _scale)
int	fftfilt_crcf_execute(fftfilt_crcf _q, float complex * _x, float complex * _y)
unsigned int	fftfilt_crcf_get_length(fftfilt_crcf _q)

Interfaces

fftfilt_crcf fftfilt_crcf_create(float * _h, unsigned int _h_len, unsigned int _n)∞

Create FFT-based FIR filter using external coefficients

• _h : filter coefficients, shape: (_h_len, 1)
• _h_len : filter length, 0 < _h_len
• _n : block size = nfft/2, _h_len-1 <= _n

fftfilt_crcf fftfilt_crcf_copy(fftfilt_crcf _q)∞

Copy object including all internal objects and state

int fftfilt_crcf_destroy(fftfilt_crcf _q)∞

Destroy filter object and free all internal memory

int fftfilt_crcf_reset(fftfilt_crcf _q)∞

Reset filter object's internal buffer

int fftfilt_crcf_print(fftfilt_crcf _q)∞

Print filter object information to stdout

int fftfilt_crcf_set_scale(fftfilt_crcf _q, float _scale)∞

Set output scaling for filter

• _q :
• _scale :

int fftfilt_crcf_get_scale(fftfilt_crcf _q, float * _scale)∞

Get output scaling for filter

• _q :
• _scale :

int fftfilt_crcf_execute(fftfilt_crcf _q, float complex * _x, float complex * _y)∞

Execute the filter on internal buffer and coefficients given a block of input samples; in-place operation is permitted (_x and _y may point to the same place in memory)

• _q : filter object
• _x : pointer to input data array, shape: (_n, 1)
• _y : pointer to output data array, shape: (_n, 1)

unsigned int fftfilt_crcf_get_length(fftfilt_crcf _q)∞

Get length of filter object's internal coefficients